Home › Land Rover › 2013 › Range Rover Sport Autobiography › Repair and Diagnosis › Restraints › Restraints Control Systems › Diagnostic Trouble Code Index DTC: Restraints Control Module (RCM) -- Range Rover Sport/L320 › Diagnostic Trouble Code Index DTC: Restraints Control Module (RCM) › Description And Operation › DTC U0300-55: Internal Control Module Software Incompatibility - Not configured › Possible Causes